Struct DataFragment 

pub struct DataFragment {
    pub id: u64,
    pub files: Vec<DataFile>,
    pub deletion_file: Option<DeletionFile>,
    pub physical_rows: u64,
    pub row_id_sequence: Option<RowIdSequence>,
}

A DataFragment is a set of files which represent the different columns of the same rows. If column exists in the schema of a dataset, but the file for that column does not exist within a DataFragment of that dataset, that column consists entirely of nulls.

Fields

id: u64

The ID of a DataFragment is unique within a dataset.

files: Vec<DataFile>

deletion_file: Option<DeletionFile>

File that indicates which rows, if any, should be considered deleted.

physical_rows: u64

Number of original rows in the fragment, this includes rows that are now marked with deletion tombstones. To compute the current number of rows, subtract deletion_file.num_deleted_rows from this value.

row_id_sequence: Option<RowIdSequence>

A serialized RowIdSequence message (see rowids.proto).

These are the row ids for the fragment, in order of the rows as they appear. That is, if a fragment has 3 rows, and the row ids are [1, 42, 3], then the first row is row 1, the second row is row 42, and the third row is row 3.

Trait Implementations

impl Clone for DataFragment

fn clone(&self) -> DataFragment

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DataFragment

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Default for DataFragment

fn default() -> Self

Returns the “default value” for a type.

impl From<&Fragment> for DataFragment

fn from(f: &Fragment) -> Self

Converts to this type from the input type.

impl Message for DataFragment

fn encoded_len(&self) -> usize

Returns the encoded length of the message without a length delimiter.

fn clear(&mut self)

Clears the message, resetting all fields to their default.

fn encode(&self, buf: &mut impl BufMut) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message to a buffer.

fn encode_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message to a newly allocated buffer.

fn encode_length_delimited( &self, buf: &mut impl BufMut, ) -> Result<(), EncodeError>

where Self: Sized,

Encodes the message with a length-delimiter to a buffer.

fn encode_length_delimited_to_vec(&self) -> Vec<u8>

where Self: Sized,

Encodes the message with a length-delimiter to a newly allocated buffer.

fn decode(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes an instance of the message from a buffer.

fn decode_length_delimited(buf: impl Buf) -> Result<Self, DecodeError>

where Self: Default,

Decodes a length-delimited instance of the message from the buffer.

fn merge(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes an instance of the message from a buffer, and merges it into self.

fn merge_length_delimited(&mut self, buf: impl Buf) -> Result<(), DecodeError>

where Self: Sized,

Decodes a length-delimited instance of the message from buffer, and merges it into self.

impl Name for DataFragment

const NAME: &'static str = "DataFragment"

Simple name for this Message. This name is the same as it appears in the source .proto file, e.g. FooBar.

const PACKAGE: &'static str = "lance.table"

Package name this message type is contained in. They are domain-like and delimited by ., e.g. google.protobuf.

fn full_name() -> String

Fully-qualified unique name for this Message. It’s prefixed with the package name and names of any parent messages, e.g. google.rpc.BadRequest.FieldViolation. By default, this is the package name followed by the message name. Fully-qualified names must be unique within a domain of Type URLs.

fn type_url() -> String

Type URL for this Message, which by default is the full name with a leading slash, but may also include a leading domain name, e.g. type.googleapis.com/google.profile.Person. This can be used when serializing into the google.protobuf.Any type.

impl PartialEq for DataFragment

fn eq(&self, other: &DataFragment) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl TryFrom<DataFragment> for Fragment

type Error = Error

The type returned in the event of a conversion error.

fn try_from(p: DataFragment) -> Result<Self>

Performs the conversion.

impl StructuralPartialEq for DataFragment